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Industrial M-Bus data logger and web server for up to 120 meters with data export and EED support – WebLog120

WebLog120 is WebLog120 – compact M-Bus data logger with integrated web server.

M-Bus data logger and web server for up to 120 meters – model WebLog120 | Consteel Electronics
5-10 days
Industrial M-Bus data logger and web server for up to 120 meters with data export and EED support – WebLog120
  • Stock: 5-10 days
  • Brand: Relay
  • Model: WebLog120
4,148.69 zł
A proven choice for industrial installations.
Ask for compatibility and model selection.
Additional discounts for registered customers.

Full design package: User manual, CE declaration, CAD, PDF, certificates and test reports

If you're preparing technical documentation or an installation design, you can receive a complete set of design materials for this model. This is a quick way to gather the required documents for audits, acceptance, or project documentation.

  • Device User Manual
  • CE Declaration of Conformity (EU Declaration of Conformity)
  • Mechanical DrawingsCAD (STEP/DWG) or high-quality PDF
  • Additional Certificates and Test Reports (if available for the model)
Request a package: User manual, CE declaration, CAD, PDF, certificates, test reports

WebLog120 – compact M-Bus data logger with integrated web server.


WebLog120 is an industrial M-Bus data logger with an integrated web server, designed for centralized meter reading, data archiving and distribution in professional metering systems. The device can directly power and read up to 120 M-Bus meters and manage up to 1000 devices when external repeaters are used.

Key product features

  • M-Bus data logger for up to 120 meters (120 load units)
  • Integrated web server – full operation via standard web browser
  • Internal FLASH memory with support for microSD cards
  • Automatic data export in CSV, XLS and XML formats
  • Data transfer via e-mail, FTP, USB or browser download
  • EED support – automatic monthly data export for tenants
  • Dual Ethernet ports for flexible network topologies
  • Can operate as an M-Bus level converter or repeater

Web-based operation and configuration

WebLog120 features an integrated web interface that enables complete configuration and operation without additional software. Access is available via LAN or optionally via WiFi. The system offers advanced user management, meter grouping and flexible scheduling of automatic read-out cycles.

Meter data logging and export

Logged data are stored in an internal SQLite database and can be exported manually or automatically. WebLog120 supports time-controlled and scheduled data exports in CSV, XLS or XML formats, enabling easy integration with billing systems, BMS platforms and analytical tools.

Communication interfaces and system expansion

The device provides a wide range of interfaces: 2×Ethernet 10/100 Mbps, RS232, RS485, USB Host, micro-USB and a repeater input, with optional WiFi. The repeater input allows connection of a second M-Bus master or system expansion while maintaining a single central data logging unit.

Mounting and industrial applications

WebLog120 is designed for DIN rail mounting (TS35) and, thanks to its compact IP30 enclosure, is suitable for installation in control cabinets and meter panels. The integrated 110–250 VAC power supply allows easy deployment in building and industrial environments.


WebLog120 is a modern and flexible M-Bus data logger with an integrated web server, designed for professional metering systems. It combines meter read-out, long-term data storage, automated export and remote access in a single central device.

Need assistance selecting an M-Bus data logger or designing your metering system? Contact our consultant: CONTACT

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